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Comprehensive utilization method of manganese slag

A manganese slag and solid technology, which is applied in the field of comprehensive utilization of industrial waste residue, can solve the problems of high cost, low extraction rate, and inability to treat wastewater, and achieve the effects of high added value, high product purity, and reduced process cost

Active Publication Date: 2014-09-03
崇左市富国新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned methods of using manganese slag generally have problems such as low extraction rate, large amount of waste water that cannot be treated, and high cost.

Method used

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  • Comprehensive utilization method of manganese slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 2. Decomposition: put the solid A in the decomposition kettle, then add the decomposition agent into the decomposition kettle for decomposition reaction, the decomposition temperature is 150°C; the solid A and the decomposition agent are added into the In the decomposition kettle; after the decomposition reaction is completed, according to the ratio of solid A and dissolving agent according to the mass volume ratio of 1:2, add the dissolving agent to the decomposition kettle, after mixing evenly, carry out solid-liquid separation to obtain solid B and liquid B;

[0025] 3. Absorption: The fluorine-containing gas produced in step 1 and step 2 is absorbed through multi-stage circulation of the absorption tower to obtain solid C and liquid C; when the liquid C reaches the set concentration, it is returned to the reactor for reuse; the solid C is dried After obtaining white carbon black;

[0026] 4. Neutralization: add neutralizing agent to liquid B to obtain solid D and l...

Embodiment 2

[0030] 2. Decomposition: Put the solid A in the decomposition kettle, then add the decomposition agent into the decomposition kettle for decomposition reaction, the decomposition temperature is 200°C; the solid A and the decomposition agent are added into the In the decomposition kettle; after the decomposition reaction is completed, add the dissolving agent to the decomposition kettle according to the ratio of solid A and dissolving agent according to the ratio of mass to volume of 1:3, after mixing evenly, carry out solid-liquid separation to obtain solid B and liquid B;

[0031] 3. Absorption: The fluorine-containing gas produced in step 1 and step 2 is absorbed through multi-stage circulation of the absorption tower to obtain solid C and liquid C; when the liquid C reaches the set concentration, it is returned to the reactor for reuse; the solid C is dried After obtaining white carbon black;

[0032] 4. Neutralization: adding a neutralizing agent to liquid B to obtain sol...

Embodiment 3

[0036] 2. Decomposition: put the solid A in the decomposition kettle, then add the decomposition agent into the decomposition kettle for decomposition reaction, the decomposition temperature is 250°C; the solid A and the decomposition agent are added into the In the decomposition kettle; after the decomposition reaction is completed, add the dissolving agent to the decomposition kettle according to the ratio of solid A and dissolving agent according to the mass volume ratio of 1:4, and after mixing uniformly, carry out solid-liquid separation to obtain solid B and liquid B;

[0037] 3. Absorption: The fluorine-containing gas produced in step 1 and step 2 is absorbed through multi-stage circulation of the absorption tower to obtain solid C and liquid C; when the liquid C reaches the set concentration, it is returned to the reactor for reuse; the solid C is dried After obtaining white carbon black;

[0038] 4. Neutralization: add a neutralizing agent to liquid B to obtain solid...

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Abstract

The invention relates to a comprehensive utilization method of industrial waste residues and particularly relates to a comprehensive utilization method of manganese slag. The method comprises the following steps: reaction, namely crushing the manganese slag, mixing the crushed manganese slag with a fluosilicic acid aqueous solution to react, and carrying out solid-liquid separation after reaction to obtain solid A and liquid A; decomposition, namely adding the solid A to a decomposing agent to undergo a decomposition reaction, adding a dissolving agent after the decomposition is finished, uniformly mixing and carrying out solid-liquid separation to obtain solid B and liquid B; absorption, namely enabling generated fluorine-containing gas to pass through an absorption tower to realize multistage circular absorption to obtain solid C and liquid C, and drying the solid C to obtain white carbon black; and neutralization, namely adding a neutralizing agent to the liquid B to obtain solid D and liquid D, carrying out high-temperature crystallization on the liquid D to obtain manganese sulfate and sulfate, and drying the solid D to obtain lightweight aluminium hydroxide. According to the comprehensive utilization method disclosed by the invention, useful elements in the manganese slag can be effectively extracted to produce basic chemical materials; in addition, the process is simple and no three-waste emission is caused; the effect of comprehensive utilization of manganese slag at high efficiency and low energy can be practically achieved.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of industrial waste residues, in particular to a method for comprehensive utilization of manganese residues. Background technique [0002] In the prior art, the methods for extracting manganese element from manganese ore mainly include acid leaching and flue gas desulfurization. Among them, the acid leaching method mainly uses sulfuric acid to leach manganese in manganese ore, and a large amount of waste residue containing silicon, aluminum, and manganese is produced after leaching; the flue gas desulfurization method uses sulfur-containing waste gas discharged from power plants and manganese ore pulp Carrying out the reaction to produce manganese sulfate will also produce a large amount of waste residue containing valuable elements such as silicon, aluminum, and manganese. [0003] At present, the utilization of manganese slag in my country is mainly concentrated in cement additives, con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04
CPCY02P10/20
Inventor 杨晓红薛希仕
Owner 崇左市富国新材料科技有限公司
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